A major incident has been declared after NHS services across England and Scotland were hit by a cyber-attack.

The prime minister said the incident was part of a wider attack affecting organisations around the world.

Staff cannot access patient data, which has been scrambled by ransomware. There is no evidence patient data has been compromised, NHS Digital has said.

The BBC understands up to 25 NHS organisations and some GP practices have been affected.

Ambulances have been diverted and there has been disruption at some GP surgeries as a result of the attack.

NHS England said patients in an emergency should go to A&E or access emergency services as they normally would.

Dr Anne Rainsberry, NHS incident director, added: "More widely, we ask people to use the NHS wisely while we deal with this major incident, which is still ongoing."

NHS Digital said the ransomware attack was not "specifically targeted at the NHS" and was affecting other organisations.

A massive ransomware campaign appears to have attacked a number of organisations around the world.

Screenshots of a well known program that locks computers and demands a payment in Bitcoin have been shared online by those claiming to be affected.

The NHS in Wales and Northern Ireland has not been affected.

NHS Digital said the attack was believed to be carried out by the malware variant Wanna Decryptor.

"NHS Digital is working closely with the National Cyber Security Centre, the Department of Health and NHS England to support affected organisations and ensure patient safety is protected.

"Our focus is on supporting organisations to manage the incident swiftly and decisively, but we will continue to communicate with NHS colleagues and will share more information as it becomes available."

oftware that locks a computer and demands payment before allowing access again - ransomware - is one of the world's biggest growing cyber-threats.

It certainly looks like that is what has hit the NHS in this case - and one IT firm says 11 of its NHS customers have been affected.

Screenshots shared online purportedly from NHS staff, show a program demanding £230 ($300) in Bitcoin that looks similar to ransomware known as WannaCryptor or WCry.

There's no indication of who is behind the attack yet, nor do we know exactly how it infected NHS systems.

But hospitals have been targeted with similar software before - it struck three US hospitals last year.

Among those affected are:

Aintree Blackpool, Lancashire - asked people not to attend A&E unless it was an emergency Broomfield Hospital, Essex Colchester General Hospital Derbyshire - shut down all IT systems Hertfordshire (East & North) - experiencing problems with computers and phone systems James Paget (Great Yarmouth) Lanarkshire - closed down its non-essential IT network and urged patients only to attend A&E in an emergency Leicester Lincoln Lister, Stevenage - postponed all non-urgent activity and asking people not to come to A&E Northwick Park (NW London) Queens Hospital, Burton Royal Berkshire - phone lines may have problems but patient care remains unaffected Southport St Bartholomew and Royal London UHNM - Royal Stoke Watford General

Dr Chris Mimnagh, who works at a medical centre in Liverpool that has been affected, said the attack had made their job impossible.

"Our entire patient record is accessed through the computer, blood results, history, medicines.

"Most of our prescribing is done electronically - we don't use the prescriptions unless the patient particularly chooses to want a piece of green paper.

"The rest of the time it's sent direct to the pharmacy and of course, all that is not able to be accessed when we lose the clinical system."

Dr Emma Fardon, a GP in Dundee, said she returned from house visits to find a message on the surgery's computers asking for the money.

"We have no idea what drugs people are on or the allergies they have. We can't access the appointments system."

Dr Afzal Ashraf, an expert on cyber-security who has previously worked as an adviser to the government, told the BBC it was likely that the malware was spreading when NHS services shared documents and information.

But he also said he thought it was unlikely the attackers had deliberately targeted the NHS.

He added: "I think they probably attacked a small company assuming they would get a small amount of money but it's got into the NHS system and now they have the full power of the state against them - because obviously the government cannot afford for this sort of thing to happen and be successful."

_________________I could be the catalyst that sparks the revolutionI could be an inmate in a long-term institutionI could dream to wide extremes, I could do or dieI could yawn and be withdrawn and watch the world go byWhat a waste...

_________________I could be the catalyst that sparks the revolutionI could be an inmate in a long-term institutionI could dream to wide extremes, I could do or dieI could yawn and be withdrawn and watch the world go byWhat a waste...

Why though did they have to publicly have to announce his solution?Wouldn't they have been better served by simply saying it was stopped, and therefore leave the malware creator wondering what went wrong?

_________________The American Republic will endure until the day Congress discovers that it can bribe the public with the public’s money.- misattributed to Alexis De Tocqueville

No representations made as to the accuracy of info in posted news articles or links

So if I understand this correctly, this malware prevented your doctor (and you by extension) from being able to access/read you medical file. "Paper" files are no longer a thing; everything is logged into you medical file via computer.

Sucks if this happens as just about EVERYTHING (other than you [fallible] recollection of you medical history (including prescriptions)) would be inaccessible.

So aside from this malware, exactly how many backups are there/should there be to what is stored? For example, if the main memory storage for medical records should fail/be corrupted, is there one back up? Two backups?

_________________The American Republic will endure until the day Congress discovers that it can bribe the public with the public’s money.- misattributed to Alexis De Tocqueville

No representations made as to the accuracy of info in posted news articles or links

It's much more sinister than simply destroying files. The damn thing subverts the entire electronic medical record system utilizing a previously unknown Microsoft system vulnerability that was apparently discovered by the NSA and THEY wrote the kernel that runs the thing.

How the thing works is the system administrator gets a message saying "pay $100,000 in bitcoin by tonight and we will turn on your system again"

_________________I haven't figured out how to the block thingy works but if anyone alters my posts I will become really, really angry and throw monkey poop out of my cage.

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